吹扫捕集-气质联用法测定涂料中的苯系物

Determination of benzene series in coating meterial by purge and trap in combination with gas chromatograph/mass spectrometry(P&T-GC/MS)

目的:建立吹扫捕集-气相色谱/质谱联用技术(P&T-GC/MS)分析与饮用水接触的涂料8种苯系物。方法:按照《生活饮用水卫生规范》对涂料进行浸泡实验,探讨不同的进样模式,采用吹扫捕集-气质联用法测定浸泡液中8种苯系物的含量。结果:分流比采用5∶1可以获得良好的峰形和灵敏度,方法线性范围0.1μg/L～4.0μg/L,相关系数均大于0.999,加标回收率在96%～106%之间,相对标准偏差1.2%～4.5%。结论:测定方法准确可靠。适合于与饮用水接触的涂料8种苯系物的同时分析。

Objective：A purge and trap in combination with gas chromatograph/mass spectrometry（PT-GC/MS） method was developed for determination of benzene series in coating meterial.Methods： Eight kinds of benzene series in the soaking liquid were analyzed by purge and trap in combination with gas chromatograph/mass spectrometry（PT-GC/MS） according to ＂Hygienic Standard for drinking water＂,and the injection mode was discussed.Results： Good peak shape and sensitivity were got by split ratio 5∶1.The linear range was 0.1 μg/L～4.0 μg/L with a good linear correlation coefficient（r0.999） and the recovery was from 96% to 106%.The relative standard deviations were from 1.2% to 4.5%.Conclusion： This analysis methods is accurate and credible.It is suitable for the analysis of eight kinds of benzene series in coating meterial for drinking water.